Thanks for all the great comments so far!

Few thoughts:
* fairbnb.coop is quite expensive too (15% fee) and is very small, but the idea is nice and we are preparing a profile there
* using unethical platforms to advertise ethical ones sounds like a nice hack
* there is more work to be done until a healthy system can sustain itself. Until then compromising may be necessary.

Btw, all of our guests (9 families so far), never heard of Mastodon nor of OSM, but they very fascinated by them!